{"title":"Light security scheme for Cooperative, Connected and Automated Mobility (CCAM)","authors":"Ramzi Boutahala , Hacène Fouchal , Marwane Ayaida","doi":"10.1016/j.vehcom.2025.100892","DOIUrl":null,"url":null,"abstract":"<div><div>Cooperative, Connected and Automated Mobility (CCAM) is a new paradigm adopted by academia and industry in order to provide safe, secure and sustainable mobility on all kinds of roads (highways, urban and rural roads). CCAM takes advantage of Cooperative Intelligent Transport Systems (C-ITS) to improve safety and to reduce traffic congestion thanks to communication and cooperation among all relevant actors (vehicle, road infrastructure, pedestrians, etc.). In Europe and the USA, adapted communication protocols have been proposed to ensure cooperation through the exchange of specific messages. In this study, we focus on the European protocols, particularly the Cooperative Awareness Messages (CAMs) as defined by the European Telecommunications Standards Institute (ETSI). CAMs are composed of a payload containing information about the vehicle status (speed, location, heading, etc.) and additional security information. This information includes a Pseudonym Certificate (PC) and a signature to guarantee the sender's authentication. However, since CAMs are sent periodically by vehicles at frequencies from 1 to 10 Hz, this addition of security data to the payload significantly increases the load and bandwidth of the communication channel. Instead of exhaustive authentication, we propose a new approach that allows vehicles to authenticate each other for the first time when they meet. Once this level of trust is reached, vehicles stop sending authenticated messages during a variable period of time (called a trust period). In addition, we propose a trust verification process to avoid malicious activities during this trust period. Our approach significantly reduces the number of signed sent CAMs, the verification and signature computations, leading to reduce communication overhead. Simulation tests conducted over the OMNET++ platform demonstrate that our approach leads to a significant decrease in communication overhead, reducing the volume of CAMs exchanged by 56%.</div></div>","PeriodicalId":54346,"journal":{"name":"Vehicular Communications","volume":"53 ","pages":"Article 100892"},"PeriodicalIF":5.8000,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vehicular Communications","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214209625000191","RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"TELECOMMUNICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
Cooperative, Connected and Automated Mobility (CCAM) is a new paradigm adopted by academia and industry in order to provide safe, secure and sustainable mobility on all kinds of roads (highways, urban and rural roads). CCAM takes advantage of Cooperative Intelligent Transport Systems (C-ITS) to improve safety and to reduce traffic congestion thanks to communication and cooperation among all relevant actors (vehicle, road infrastructure, pedestrians, etc.). In Europe and the USA, adapted communication protocols have been proposed to ensure cooperation through the exchange of specific messages. In this study, we focus on the European protocols, particularly the Cooperative Awareness Messages (CAMs) as defined by the European Telecommunications Standards Institute (ETSI). CAMs are composed of a payload containing information about the vehicle status (speed, location, heading, etc.) and additional security information. This information includes a Pseudonym Certificate (PC) and a signature to guarantee the sender's authentication. However, since CAMs are sent periodically by vehicles at frequencies from 1 to 10 Hz, this addition of security data to the payload significantly increases the load and bandwidth of the communication channel. Instead of exhaustive authentication, we propose a new approach that allows vehicles to authenticate each other for the first time when they meet. Once this level of trust is reached, vehicles stop sending authenticated messages during a variable period of time (called a trust period). In addition, we propose a trust verification process to avoid malicious activities during this trust period. Our approach significantly reduces the number of signed sent CAMs, the verification and signature computations, leading to reduce communication overhead. Simulation tests conducted over the OMNET++ platform demonstrate that our approach leads to a significant decrease in communication overhead, reducing the volume of CAMs exchanged by 56%.
期刊介绍:
Vehicular communications is a growing area of communications between vehicles and including roadside communication infrastructure. Advances in wireless communications are making possible sharing of information through real time communications between vehicles and infrastructure. This has led to applications to increase safety of vehicles and communication between passengers and the Internet. Standardization efforts on vehicular communication are also underway to make vehicular transportation safer, greener and easier.
The aim of the journal is to publish high quality peer–reviewed papers in the area of vehicular communications. The scope encompasses all types of communications involving vehicles, including vehicle–to–vehicle and vehicle–to–infrastructure. The scope includes (but not limited to) the following topics related to vehicular communications:
Vehicle to vehicle and vehicle to infrastructure communications
Channel modelling, modulating and coding
Congestion Control and scalability issues
Protocol design, testing and verification
Routing in vehicular networks
Security issues and countermeasures
Deployment and field testing
Reducing energy consumption and enhancing safety of vehicles
Wireless in–car networks
Data collection and dissemination methods
Mobility and handover issues
Safety and driver assistance applications
UAV
Underwater communications
Autonomous cooperative driving
Social networks
Internet of vehicles
Standardization of protocols.